n ― number of time range
specifications describing the time intervals used to calculate the
statistically-processed field

48-51

Total number of data values
missing in the statistical process
52-63 Specification of the outermost (or only) time
range over which statistical processing is done

52

Statistical process used to
calculate the processed field from the field at each time increment
during the time range
(see Code Table 4.10)

53

Type of time increment between
successive fields used in the statistical processing (see Code Table
4.11)

54

Indicator of unit of time range
over which statistical processing is done (see Code Table 4.4)

55-58

Length of the time range over
which statistical processing is done, in units defined by the previous
octet

59

Indicator of unit of time for
the increment between the successive fields used (see Code Table 4.4)

60-63

Time increment between
successive fields, in units defined by the previous octet (see Note 3)
64-nn These octets are included only if n>1, where
nn = 51 +12 x n

64-75

As octets 52 to 63, next
innermost step of processing

76-nn

Additional time range
specifications, included in accordance with the value of n,
Contents as octets 52 to 63, repeated as necessary.

Notes:

(1) Hours greater than 65534 will be coded as 65534.

(2) The reference time in section 1 and the forecast
time together define the beginning of the overall time interval.

(3) An increment of zero means that the statistical
processing the result of continuous (or near continuous) process, not
the
processing of a number of
discrete samples. Examples of such continuous process are the
temperatures measured by
analogue maximum and
minimum thermometers or thermographs and the rainfall measured by a
rain guage. The
reference and forecast
times are successively set to their initial values plus or minus the
increment, as defined by the type
of time increment (one
of octets 51,63, 75 ...). For all but the innermost (last) time
range, the next inner range is then
precessed using these
reference and forecast times as the initial reference and forecast time.